import java.util.Scanner;
public class SandGlassPattern{
public static void main(String args[]){
Scanner sc = new Scanner(System.in);
System.out.println("Enter no of rows");
int n = sc.nextInt();
//Upper half
for(int i=n;i>0;i--){
for(int j=0;j<n-i;j++){
System.out.print(" ");
}
for(int j=0;j<i;j++){
System.out.print("*"+" ");
}
System.out.println();
}
//lower half
for(int i=1;i<=n;i++){
for(int j=0;j<n-i;j++){
System.out.print(" ");
}
for(int j=0;j<i;j++){
System.out.print("*"+" ");
}
System.out.println();
}
}
}
